Public Information Statement
Issued by NWS Denver/Boulder, CO

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
NOUS45 KBOU 200859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT THU JUL 20 2017

...Today in metro Denver weather history...

7-25  In 1934...a streak of 15 consecutive days of 90 degrees
        ranked 5th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
13-5  In 2008...a streak of 24 consecutive days of 90 degrees
        shattered the previous record of 18 consecutive days
        established in 1901 and 1874. new single
        day record high temperatures were set in the month of July.
        In August however...a record of 104 degrees was set on the
        1st...and another record of 103 degrees was set on the 2nd.
        In addition...a record low min of 70 degrees was set on
        August 2nd.
18-2  In 1987...a streak of 16 consecutive days of 90 degrees
        ranked 4th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
19-23 In 2005...the high temperature climbed above 100 degrees on
        each of the 5 days with readings of 101 on the 19th...105 on
        the 20th...104 on the 21st...and 102 on both the 22nd and 23rd.
        A new record maximum temperature for the month of July of 105
        degrees was set on the 20th...which also equaled the all time
        record maximum for Denver of 105 degrees first set on August
        8th in 1878.  Daily maximum temperature records were set on
        each day...and the 5 day period equaled the record for the
        most consecutive days of 100 degrees or more first set from
        July 4th through 8th in 1989.  The intense heat resulted in
        a high use of electricity for cooling purposes.  The demand
        for electric power exceeded the supply and rolling black-outs...
        each lasting about an hour...were scheduled across metro Denver
        during the afternoons and early evenings.
20    In apparent thunderstorm produced sustained northwest
        winds to 45 mph with gusts to 51 mph.
      In 1939...the high temperature reached 102 degrees in downtown
        Denver.  This was the highest temperature recorded since
        August 8...1878...a period of 61 years...and the third highest
        temperature of record at the time.  Six miles to the east...
        at Denver Municipal Airport...the maximum temperature reached
        104 degrees.  A dry period during mid-July...combined with low
        relative humidities...resulted in an unusually large number
        of forest fires in the mountains west of Denver.
      In afternoon thunderstorm caused two lightning
        deaths.  The men were struck by lightning near the Denver
      In 1951...a thunderstorm wind gust to 54 mph was recorded at
        Stapleton Airport.
      In 1965...heavy rain west of Denver damaged roads and bridges.
        Two bridges in Golden were washed out.  Lightning in Denver
        caused some power failures and fires...mostly in the northeast
        section of the city.  Heavy rain caused street flooding in
        the City of Denver.  Hail as large as 1/2 inch in diameter
        and 0.40 inch of rain in 5 minutes were measured at
        Stapleton International Airport where precipitation totaled
        1.09 inches.  Lightning damaged a house in Littleton...and
        caused a power outage in Idaho Springs.
      In 1973...lightning damage was reported west of Arvada.
      In 1975...heavy rains caused flash flooding across metro
        Denver...resulting in the closing of several streets and
        damage to numerous homes and businesses.  Hail 1/2 to 3/4
        inch in diameter was reported.
      In 1976...heavy thunderstorms caused flooding of streets in
        southeast Denver and western Arapahoe counties.  A total of
        3.35 inches of rain was measured at Kassler southwest of
      In 1978...a girl was injured by lightning at a country club
        southwest of Denver.
      In 1984...heavy rain was reported just east of Buckley Field in
        Aurora where 1.15 inches fell in just 45 minutes.
      In 1986...thunderstorms dumped heavy rain across metro Denver
        causing extensive street flooding...power outages...and
        basement flooding.  The greatest recorded rainfall was 4.39
        inches in Lakewood.  In extreme northwest Denver...2.29
        inches of rain fell in just 20 minutes.  Arvada was drenched
        with 2.60 inches of rain...and over an inch fell in southeast
        Denver and adjacent sections of Aurora.
      In 1990...heavy thunderstorm rains caused flash flooding in
        sections of Littleton where 1.20 inches of rain fell in
        less than 30 minutes.  The deluge caused Dry Creek to jump
        its banks...causing damage to residential streets...curbs...and
        sidewalks.  Nearly 100 vehicles were stranded for a time in
        fender-deep water when sewers and drainage ditches became
        choked with debris.  The heavy runoff submerged many
        Littleton streets and intersections.
      In 1992...strong thunderstorms moved slowly through east metro
        Denver...producing rainfall up to 2.50 inches in a short time.
        Weather spotters reported 0.75 to 1.00 inch of rain in less
        than 30 minutes.  Many areas of southeast Denver were
        flooded...including I-25 where up to 6 feet of water
        filled some underpasses.  Hail to 3/4 inch in diameter
        fell in Aurora.
      In 1995...a tornado touched down briefly in an open field
        near Strasburg.  Thunderstorm winds gusted to 58 mph at
        Centennial Airport.
      In 1996...strong thunderstorm winds damaged the building of
        a telephone installation company in the City of Denver.
      In 1998...the high temperature reached 100 degrees at
        Denver International Airport.
      In 2006...heavy rainfall in the Overland Wildfire burn area
        caused minor flash flooding in Jamestown.  The roads behind
        the Jamestown Fire Hall were washed out...when a culvert was
        blocked by debris.  A rockslide was also reported in town.
      In 2009...a severe thunderstorm produced damaging winds...large
        hail and very heavy rain across the western and southern
        suburbs of Denver.  Widespread damage was observed in the
        cities of Arvada...Lakewood and Wheat Ridge.  The intense
        straightline winds were the result of a wet microburst which
        downed hundreds of trees and snapped power poles.  Wind
        gusts to 80 mph were reported along with hail up to 1 3/4
        inches in diameter.  The combination of wind and hail
        caused widespread damage to homes and vehicles.  The damage
        claim estimates totaled 350 million dollars; about 32900
        claims were filed for homes...while another 19500 claims
        were filed for vehicles.  As many as 90000 homes and
        businesses were left without power.  In some areas it took
        up to 3 days to completely restore electrical service.
        Minor injuries were reported from broken glass during the
        storm...but no one was hospitalized.  The storm crippled the
        computers at the Colorado Crime Information Center in
        Lakewood for nearly 3 hours.  One weak tornado touched down
        near Parker but did no damage.  In southern Weld County...
        severe thunderstorms produced widepread damage over 150
        square miles of farmland.  In all...400 farms were directly
        impacted by severe weather.  Damage to crops alone was
        estimated to 3 million dollars.  At Denver International
        Airport...a peak wind gust to 48 mph was observed from the
        northeast.  In addition...1.01 inches was measured at the
      In 2013...severe thunderstorms produced large hail...ranging in
        size from nickel to golfball...across portions of Arapahoe...
        Denver...Elbert and Weld Counties. In addition...damaging wind
        gusts to 60 mph snapped large tree branches in Thornton and
        3 miles west-southwest of Buckley AFB.  In Bennett...hail up
        to 1 1/2 inches in diameter was reported. At Denver
        International Airport...a peak wind gust to 58 mph was
        recorded from the northeast.
20-23 In 1961...unusually cool weather for July resulted in several
        temperature records.  Record minimum temperatures were
        set or equaled on each day with readings of 51...51...49...
        and 49 degrees.  High temperature of only 64 degrees on the
        21st was a record low maximum for the date.
20-25 In 1965...heavy showers and thunderstorms doused metro Denver
        with significant rain each day.  Rainfall for the six days
        totaled 5.16 inches at Stapleton International Airport.
        Massive rainfall occurred on the 20th...21st...and 25th...
        flooding streets and basements and causing streams to
        overflow.  The heaviest rainfall...2.05 Stapleton
        International Airport occurred on the 25th.

$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.